Swarm E/ ePOP-RRI Observations of Proton Whistlers and Other Natural Emissions
Abstract
In this work we present polarization characteristics of proton whistlers and other natural emissions observed by the Radio Receiver Instrument (RRI) on the Enhanced Polar Outflow Probe (ePOP: also known as Swarm-E), which is a payload on CASSIOPE spacecraft. RRI consists of two orthogonal dipole antennas which operates as a polarimeter.
These proton whistler observations were made during May 19, 2018 to August 19, 2018 ePOP passes. Based on their dispersion characteristics we categorize those as in-situ generated, Trans Equatorial Proton Whistlers (TEPW) or as Ionospherically Reflected Proton Whistlers (IRPW). One interesting result of this work is the correlation between the observation location of these different types and the geographical location. In-situ generated and IRPW types were observed on landmass and TEPW type was observed above the ocean. Fractional hop electron cyclotron whistlers being the source of proton whistlers, high whistler activity above landmass should be the contributing factor to the increased proton whistler activity in those regions. In addition to proton whistlers, we also present the polarization characteristics of other natural emissions including, electron-cyclotron whistlers, chorus, hiss and quasi-periodic emissions.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMSM23C3225H
- Keywords:
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- 2764 Plasma sheet;
- MAGNETOSPHERIC PHYSICS;
- 2774 Radiation belts;
- MAGNETOSPHERIC PHYSICS;
- 7859 Transport processes;
- SPACE PLASMA PHYSICS;
- 7867 Wave/particle interactions;
- SPACE PLASMA PHYSICS